西北地质2025，Vol.58Issue(5)：75-86,12.DOI:10.12401/j.nwg.2025059
东秦岭北岭金矿床黄铁矿标型特征及成矿指示意义
Typomorphic Characteristics and Metallogenic Indicative Significance of Pyrite in Beiling Gold Deposit,East Qinling
辛明宇 1刘丽 1盛渊明 2曾涛 1王汉辉 1陈龙龙 1唐利1
作者信息
- 1. 中国地质大学(北京)地球科学与资源学院,北京 100083
- 2. 中国石油集团测井有限公司测井技术研究院,陕西 西安 710077
- 折叠
摘要
Abstract
Beiling gold deposit is located in the Xiong'ershan polymetallic ore cluster in Eastern Qinling,as a typical tectonically controlled alteration rock gold deposit,its deep metallogenic potential needs to be explored urgently.This study focused on the gold-bearing mineral pyrite in the 530 m and 620 m elevation orebodies of the F881 ore body at the Beiling Gold Deposit.With the help of field geological investigation,mineralogical analysis,and systematic study of the production characteristics,composition standard characteristics and thermo-electric characteristics of gold-bearing mineral pyrite,the metallogenic temperature,formation depth and de-nudation rate of pyrite at different elevations are deeply discussed,and the following results and understandings are obtained:① Analysis of pyrite samples at 530 m and 620 m elevations shows no significant difference in ω(Fe)/ω(As+S)values,which indicates that the pyrite at the elevations of the two elevations is in the middle and deep positions of the ore body.At the same time,the ω(Au)/ω(Ag)ratio indicates that the ore body is of mag-matic hydrothermal origin.② The average formation temperature of pyrite at 530 m elevation is 202～291℃,and the average formation temperature of pyrite at 620 m elevation is 219～275℃,The formation temperature of pyrite in the two elevations is basically the same,indicating that it was formed in a mesothermal environment.③In terms of ore body denudation rates over two elevations,the ones at the 530 m elevation is from 53.0%to 54.0%and the ones at the 620 m elevation is from 53.5%to 56.8%,showing a lower denudation rate overall.Based on the above research results,the pyrite samples of the two elevations of the Beiling gold de-posit are in the middle and deep positions of the ore body,which indicates that there is room for extension of the ore body to the deep part and has great potential for deep exploration.关键词
秦岭造山带/北岭金矿/黄铁矿/标型特征Key words
Qinling orogenic belt/Beiling gold deposit/pyrite/typomorphic characteristics分类
天文与地球科学引用本文复制引用
辛明宇,刘丽,盛渊明,曾涛,王汉辉,陈龙龙,唐利..东秦岭北岭金矿床黄铁矿标型特征及成矿指示意义[J].西北地质,2025,58(5):75-86,12.
